What is a deep conversation? What topics does it actually cover?

What is a deep conversation? What topics does it actually cover?

A lot of people and even dating coaches say that a deep conversations helps to decide if someone is opening up to you and, therefore, actually likes you or not, but what are deep conversations? What topics do they cover? Of course, not the weather nor the price of a bread roll, so what then? How do we know that this topic is good for a talk with a friend or an acquaitance or that one is better for a woman/man we like?

What is a deep conversation? What topics does it actually cover?
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